its not 2 difficult.make sure u have a pokemon that know how 2 surf first. when in slateport talk to all the team aqua members there including the one on thre beach.one will say not 2 go near there hideout. well there's ure answer- go down onto the beach where u will find a team aqua member training a load of wailmers in the sea.surf north from there and find a cave. once u deafeat the team aqua members inside the team aqua group in slateport will go as well as the wailmers that were blocking ure path previously.enjoy!!!